Well, well, well, it seems like our water is about to go on a little journey! Let's see if we can figure out where it's headed.
If we have 3 pounds of water at 100 degrees Fahrenheit and we're adding it to 500 pounds of water at 40 degrees Fahrenheit, they're bound to meet somewhere in the middle. Imagine them having a warm, cozy chat.
Now, without diving into all those complex equations, let me tell you a little secret. The final temperature is going to be somewhere between 40 and 100 degrees Fahrenheit. Ah, suspense!
If you really want an exact answer, you might want to consult a science textbook or calculator. But hey, life's more fun with a little mystery, don't you think?